High Quality - This 5 RECTANGLE/SQUARE sun shade sail installation kit is made of high-quality 316 marine-grade stainless steel. Grade 316 stainless steel is extremely strong and resistant to the elements. Hardware Kit Includes - Shade sail accessories set includes: Turnbuckle (5") x 2 pcs, Pad eye x 4 pcs, Snap hook x 2 pcs, Screw x 16 pcs, Plastic expansion x 16 pcs. Adjustable Turnbuckle - The sun shade sail kit features an adjustable turnbuckle to create tension, ensuring your sails remain taut during installation. You can adjust the distance between your sail shade and the wall, post, or fixing point, with length adjustable from 5" to 7". Plastic Expansion - The sail shade hardware kit includes plastic expansion anchors designed to secure screws firmly. Using plastic expansions provides a more stable and durable attachment compared to direct wall mounting. Wide Application - This 5 RECTANGLE/SQUARE sun shade sail hardware kit is ideal for installing rectangular or square shade sails up to 150 sq. ft., such as 8'x10', 10'x13', 10'x10', and 12'x12'.